blob: 7e353f6c3639332a2e479841454803404f0c3f3c [file] [log] [blame]
/**
* @license
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import {assert} from '@open-wc/testing';
import '../../../test/common-test-setup';
import {waitEventLoop} from '../../../test/test-utils';
import './gr-lib-loader';
import {GrLibLoader} from './gr-lib-loader';
suite('gr-lib-loader tests', () => {
let grLibLoader: GrLibLoader;
let resolveLoad: any;
let rejectLoad: any;
let loadStub: sinon.SinonStub;
setup(() => {
grLibLoader = new GrLibLoader();
loadStub = sinon.stub(grLibLoader, '_loadScript').callsFake(
() =>
new Promise((resolve, reject) => {
resolveLoad = resolve;
rejectLoad = reject;
})
);
});
test('notifies all callers when loaded', async () => {
const libraryConfig = {src: 'foo.js'};
const loaded1 = sinon.stub();
const loaded2 = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(loaded1);
grLibLoader.getLibrary(libraryConfig).then(loaded2);
resolveLoad();
await waitEventLoop();
const lateLoaded = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(lateLoaded);
await waitEventLoop();
assert.isTrue(loaded1.calledOnce);
assert.isTrue(loaded2.calledOnce);
assert.isTrue(lateLoaded.calledOnce);
});
test('notifies all callers when failed', async () => {
const libraryConfig = {src: 'foo.js'};
const failed1 = sinon.stub();
const failed2 = sinon.stub();
grLibLoader.getLibrary(libraryConfig).catch(failed1);
grLibLoader.getLibrary(libraryConfig).catch(failed2);
rejectLoad();
await waitEventLoop();
const lateFailed = sinon.stub();
grLibLoader.getLibrary(libraryConfig).catch(lateFailed);
await waitEventLoop();
assert.isTrue(failed1.calledOnce);
assert.isTrue(failed2.calledOnce);
assert.isTrue(lateFailed.calledOnce);
});
test('runs library configuration only once', async () => {
const configureCallback = sinon.stub();
const libraryConfig = {
src: 'foo.js',
configureCallback,
};
const loaded1 = sinon.stub();
const loaded2 = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(loaded1);
grLibLoader.getLibrary(libraryConfig).then(loaded2);
resolveLoad();
await waitEventLoop();
const lateLoaded = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(lateLoaded);
await waitEventLoop();
assert.isTrue(configureCallback.calledOnce);
});
test('resolves to result of configureCallback, if any', async () => {
const library = {someFunction: () => 'foobar'};
const libraryConfig = {
src: 'foo.js',
configureCallback: () => (window as any).library,
};
const loaded1 = sinon.stub();
const loaded2 = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(loaded1);
grLibLoader.getLibrary(libraryConfig).then(loaded2);
(window as any).library = library;
resolveLoad();
await waitEventLoop();
assert.isTrue(loaded1.calledWith(library));
assert.isTrue(loaded2.calledWith(library));
const lateLoaded = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(lateLoaded);
await waitEventLoop();
assert.isTrue(lateLoaded.calledWith(library));
});
suite('preloaded', () => {
setup(() => {
(window as any).library = {
initialize: sinon.stub(),
};
});
teardown(() => {
delete (window as any).library;
});
test('does not load library again if detected present', async () => {
const libraryConfig = {
src: 'foo.js',
checkPresent: () => (window as any).library !== undefined,
};
const loaded1 = sinon.stub();
const loaded2 = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(loaded1);
grLibLoader.getLibrary(libraryConfig).then(loaded2);
resolveLoad();
await waitEventLoop();
const lateLoaded = sinon.stub();
grLibLoader.getLibrary(libraryConfig).then(lateLoaded);
await waitEventLoop();
assert.isFalse(loadStub.called);
assert.isTrue(loaded1.called);
assert.isTrue(loaded2.called);
assert.isTrue(lateLoaded.called);
});
test('runs configuration for externally loaded library', async () => {
const libraryConfig = {
src: 'foo.js',
checkPresent: () => (window as any).library !== undefined,
configureCallback: () => (window as any).library.initialize(),
};
grLibLoader.getLibrary(libraryConfig);
resolveLoad();
await waitEventLoop();
assert.isTrue((window as any).library.initialize.calledOnce);
});
test('loads library again if not detected present', async () => {
(window as any).library = undefined;
const libraryConfig = {
src: 'foo.js',
checkPresent: () => (window as any).library !== undefined,
};
grLibLoader.getLibrary(libraryConfig);
resolveLoad();
await waitEventLoop();
assert.isTrue(loadStub.called);
});
});
});